New description for the Goblin Knight, minor change to the Wolf Rider

From the "revisiting Wesnoth unit descriptions" forum thread,
https://r.wesnoth.org/t48137 , with further changes during the
pull request review.

data/core/units/goblins/Knight.cfg

@@ -15,9 +15,9 @@
     advances_to=Direwolf Rider
     cost=32
     usage=scout
-    description= _ "The Goblin ‘Knights’ have little in common with the men who share that title, and the title is bestowed in mockery by their enemies. The similarity is simply that they are the elite of the wolf riders, likely promoted to their position by their success in some audacious raid.
+    description= _ "Battle experience strengthens not only the combat prowess of both mount and rider, but also heartens the bond between them. While a human knight may ride different steeds into battle, a ‘goblin knight’ refers to goblin and wolf together as a single unit, fiercely loyal to one another almost to a fault.
 
-The wolves they are given are bred for speed and strength, making them quite dangerous in combat."
+Among orcs, the riders are treated as a class above goblins, even when separated from their mount. Orcish grunts, while feeling themselves superior to goblins, recognize that picking a fight with the rider is also picking a fight with jaws that strike faster than a sword, and almost as hard."
     die_sound={SOUND_LIST:WOLF_DIE}
     [movement_anim]
         start_time=0

data/core/units/goblins/Wolf_Rider.cfg

@@ -27,9 +27,9 @@
     advances_to=Goblin Knight,Goblin Pillager
     cost=17
     usage=scout
-    description= _ "No one is quite sure how the practice of taming and riding wolves came into being, but the advantages of it for a goblin are obvious. Goblins are smaller and much weaker than their orcish kin, and are often tasked to the most dangerous and unwanted parts of a fight. Any who can manage to win themselves a mount have a much safer, and daresay, more amusing role in combat.
+    description= _ "No one is quite sure how the practice of taming and riding wolves came into being, but the advantages of it for a goblin are obvious. Goblins are much smaller and weaker than their orcish kin and are often sent to the most dangerous and unwanted parts of a fight. Any who manage to tame a mount have a much safer role in combat.
 
-Wolves, likely, could never support the weight of a man in plate, but a goblin in leather armor is a simple load to bear. Quite unlike horses, these mounts have a rather easy time traversing the mountains, though water and woods will still slow them down."
+Though few wolves could even stand with the weight of a true orc on their back, a goblin is quite within many wolves’ ability to carry swiftly. Unlike horses, these mounts have a rather easy time traversing the mountains, though water and woods will still slow them down."
     die_sound={SOUND_LIST:WOLF_DIE}
     [movement_anim]
         start_time=-0